Elementary treatise on electricity and magnetism (1903)
Foster, George Carey, 1835-1919, Joubert, Jules François, 1834-1910. Traité élémentaire d'électricité, Porter, Alfred William, 1863- joint author · London, New York, Longmans, Green, and co. · leaf 360
268] ENERGY OF A CURRENT The application of the same principles shows that, under theaction of its own flux, a circuit will tend to present the greatestpossible surface; if the contour is flexible, it will take the form … Fig. 224. of a circle, as this comprises the greatest area within a givenperimeter. This is the true explanation of a well-known experiment ofAmpere, which he regarded as proving that two consecutiveelements of the same current repel one another. Two .quantities of mercury (Fig. 225), separated by…
Electricity · Magnetism
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